senior foreign policy advisor. welcome to you both. let me start with you, p.j. crowley. what do we do about iran and president ahmadinejad? >> well, this clearly will be one of the most compelling issues that the next president faces, either obama in a second term or romney in a first term. as the president said today, there's still time and space to work this diplomatically. he's put down a very firm position that iran will not have a nuclear weapon. i think governor romney actually agrees with that. >> richard, one of the problems here of course is credibility on all sides, and the reason i say that, i discussed with president clinton earlier the comparisons to iraq. here you have another bad guy in the same kind of region who everyone says has wmd or wants to, in this case, get wmd. it turned out to be not true in the case of saddam hussein. he didn't have any weapons of mass destruction. can the west afford to go into any kind of military conflict with iran, with ahmadinejad, and then discover actually all he